lets concentrate on
Note that this is the same as ........i multiplied by
So our integral becomes:
which is relatively easy to deal with
indeed haha! actually, this problem came from http://www.mathhelpforum.com/math-he...plication.html
and look at my long solution, i thought many things at the same time!
it was probably a mistake that i stumbled on it
i just wanted to get rid of the square root. so i made what's underneath it . then i realized that i would need a that wasn't there, so i put it there. wonder how it came to me